1. Bring large sauce pan of salted water to boil Add beans and simmmer just until tender/crisp, about 5 minutes. Drain completely.2. Place beans in large bowl. Gently mix in lime juice, oilive oil, 1/4 cup onion, jalapenos, salt, oregano and cilantro. Let sit for half and hour. (Important to do this for maximum flavor!)3. When ready to serve, gently mix in chopped red onion, if using, and cheese, if using. Serve the avocado and tomato on the side or mixed in.